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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/ioctl.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | */ | |
9 | ||
10 | #include <linux/fs.h> | |
ac27a0ec | 11 | #include <linux/capability.h> |
ac27a0ec DK |
12 | #include <linux/time.h> |
13 | #include <linux/compat.h> | |
42a74f20 | 14 | #include <linux/mount.h> |
748de673 | 15 | #include <linux/file.h> |
9b7365fc | 16 | #include <linux/quotaops.h> |
8da4b8c4 | 17 | #include <linux/uuid.h> |
7c0f6ba6 | 18 | #include <linux/uaccess.h> |
783d9485 | 19 | #include <linux/delay.h> |
3dcf5451 CH |
20 | #include "ext4_jbd2.h" |
21 | #include "ext4.h" | |
0c9ec4be DW |
22 | #include <linux/fsmap.h> |
23 | #include "fsmap.h" | |
24 | #include <trace/events/ext4.h> | |
ac27a0ec | 25 | |
393d1d1d DTB |
26 | /** |
27 | * Swap memory between @a and @b for @len bytes. | |
28 | * | |
29 | * @a: pointer to first memory area | |
30 | * @b: pointer to second memory area | |
31 | * @len: number of bytes to swap | |
32 | * | |
33 | */ | |
34 | static void memswap(void *a, void *b, size_t len) | |
35 | { | |
36 | unsigned char *ap, *bp; | |
393d1d1d DTB |
37 | |
38 | ap = (unsigned char *)a; | |
39 | bp = (unsigned char *)b; | |
40 | while (len-- > 0) { | |
4b7e2db5 | 41 | swap(*ap, *bp); |
393d1d1d DTB |
42 | ap++; |
43 | bp++; | |
44 | } | |
45 | } | |
46 | ||
47 | /** | |
48 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
49 | * This function is used for the primary swap between inode1 and inode2 | |
50 | * and also to revert this primary swap in case of errors. | |
51 | * | |
52 | * Therefore you have to make sure, that calling this method twice | |
53 | * will revert all changes. | |
54 | * | |
55 | * @inode1: pointer to first inode | |
56 | * @inode2: pointer to second inode | |
57 | */ | |
58 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
59 | { | |
60 | loff_t isize; | |
61 | struct ext4_inode_info *ei1; | |
62 | struct ext4_inode_info *ei2; | |
63 | ||
64 | ei1 = EXT4_I(inode1); | |
65 | ei2 = EXT4_I(inode2); | |
66 | ||
67 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); | |
68 | memswap(&inode1->i_version, &inode2->i_version, | |
69 | sizeof(inode1->i_version)); | |
70 | memswap(&inode1->i_blocks, &inode2->i_blocks, | |
71 | sizeof(inode1->i_blocks)); | |
72 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); | |
73 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); | |
74 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); | |
75 | ||
76 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
77 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); | |
78 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); | |
cde2d7a7 TT |
79 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
80 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
81 | |
82 | isize = i_size_read(inode1); | |
83 | i_size_write(inode1, i_size_read(inode2)); | |
84 | i_size_write(inode2, isize); | |
85 | } | |
86 | ||
87 | /** | |
88 | * Swap the information from the given @inode and the inode | |
89 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
90 | * important fields of the inodes. | |
91 | * | |
92 | * @sb: the super block of the filesystem | |
93 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
94 | * | |
95 | */ | |
96 | static long swap_inode_boot_loader(struct super_block *sb, | |
97 | struct inode *inode) | |
98 | { | |
99 | handle_t *handle; | |
100 | int err; | |
101 | struct inode *inode_bl; | |
393d1d1d | 102 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 103 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 104 | |
d8558a29 TT |
105 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
106 | return -EINVAL; | |
393d1d1d | 107 | |
d8558a29 TT |
108 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
109 | return -EPERM; | |
393d1d1d | 110 | |
393d1d1d | 111 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
112 | if (IS_ERR(inode_bl)) |
113 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
114 | ei_bl = EXT4_I(inode_bl); |
115 | ||
116 | filemap_flush(inode->i_mapping); | |
117 | filemap_flush(inode_bl->i_mapping); | |
118 | ||
119 | /* Protect orig inodes against a truncate and make sure, | |
120 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 121 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
122 | |
123 | truncate_inode_pages(&inode->i_data, 0); | |
124 | truncate_inode_pages(&inode_bl->i_data, 0); | |
125 | ||
126 | /* Wait for all existing dio workers */ | |
127 | ext4_inode_block_unlocked_dio(inode); | |
128 | ext4_inode_block_unlocked_dio(inode_bl); | |
129 | inode_dio_wait(inode); | |
130 | inode_dio_wait(inode_bl); | |
131 | ||
132 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
133 | if (IS_ERR(handle)) { | |
134 | err = -EINVAL; | |
30d29b11 | 135 | goto journal_err_out; |
393d1d1d DTB |
136 | } |
137 | ||
138 | /* Protect extent tree against block allocations via delalloc */ | |
139 | ext4_double_down_write_data_sem(inode, inode_bl); | |
140 | ||
141 | if (inode_bl->i_nlink == 0) { | |
142 | /* this inode has never been used as a BOOT_LOADER */ | |
143 | set_nlink(inode_bl, 1); | |
144 | i_uid_write(inode_bl, 0); | |
145 | i_gid_write(inode_bl, 0); | |
146 | inode_bl->i_flags = 0; | |
147 | ei_bl->i_flags = 0; | |
148 | inode_bl->i_version = 1; | |
149 | i_size_write(inode_bl, 0); | |
150 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 151 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
152 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
153 | ext4_ext_tree_init(handle, inode_bl); | |
154 | } else | |
155 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
156 | } | |
157 | ||
158 | swap_inode_data(inode, inode_bl); | |
159 | ||
eeca7ea1 | 160 | inode->i_ctime = inode_bl->i_ctime = current_time(inode); |
393d1d1d DTB |
161 | |
162 | spin_lock(&sbi->s_next_gen_lock); | |
163 | inode->i_generation = sbi->s_next_generation++; | |
164 | inode_bl->i_generation = sbi->s_next_generation++; | |
165 | spin_unlock(&sbi->s_next_gen_lock); | |
166 | ||
167 | ext4_discard_preallocations(inode); | |
168 | ||
169 | err = ext4_mark_inode_dirty(handle, inode); | |
170 | if (err < 0) { | |
171 | ext4_warning(inode->i_sb, | |
172 | "couldn't mark inode #%lu dirty (err %d)", | |
173 | inode->i_ino, err); | |
174 | /* Revert all changes: */ | |
175 | swap_inode_data(inode, inode_bl); | |
176 | } else { | |
177 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
178 | if (err < 0) { | |
179 | ext4_warning(inode_bl->i_sb, | |
180 | "couldn't mark inode #%lu dirty (err %d)", | |
181 | inode_bl->i_ino, err); | |
182 | /* Revert all changes: */ | |
183 | swap_inode_data(inode, inode_bl); | |
184 | ext4_mark_inode_dirty(handle, inode); | |
185 | } | |
186 | } | |
393d1d1d | 187 | ext4_journal_stop(handle); |
393d1d1d DTB |
188 | ext4_double_up_write_data_sem(inode, inode_bl); |
189 | ||
30d29b11 | 190 | journal_err_out: |
393d1d1d DTB |
191 | ext4_inode_resume_unlocked_dio(inode); |
192 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 193 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 194 | iput(inode_bl); |
393d1d1d DTB |
195 | return err; |
196 | } | |
197 | ||
ba679017 | 198 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
199 | static int uuid_is_zero(__u8 u[16]) |
200 | { | |
201 | int i; | |
202 | ||
203 | for (i = 0; i < 16; i++) | |
204 | if (u[i]) | |
205 | return 0; | |
206 | return 1; | |
207 | } | |
ba679017 | 208 | #endif |
9bd8212f | 209 | |
9b7365fc LX |
210 | static int ext4_ioctl_setflags(struct inode *inode, |
211 | unsigned int flags) | |
212 | { | |
213 | struct ext4_inode_info *ei = EXT4_I(inode); | |
214 | handle_t *handle = NULL; | |
fdde368e | 215 | int err = -EPERM, migrate = 0; |
9b7365fc LX |
216 | struct ext4_iloc iloc; |
217 | unsigned int oldflags, mask, i; | |
218 | unsigned int jflag; | |
219 | ||
220 | /* Is it quota file? Do not allow user to mess with it */ | |
221 | if (IS_NOQUOTA(inode)) | |
222 | goto flags_out; | |
223 | ||
224 | oldflags = ei->i_flags; | |
225 | ||
226 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
227 | jflag = flags & EXT4_JOURNAL_DATA_FL; | |
228 | ||
229 | /* | |
230 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
231 | * the relevant capability. | |
232 | * | |
233 | * This test looks nicer. Thanks to Pauline Middelink | |
234 | */ | |
235 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { | |
236 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
237 | goto flags_out; | |
238 | } | |
239 | ||
240 | /* | |
241 | * The JOURNAL_DATA flag can only be changed by | |
242 | * the relevant capability. | |
243 | */ | |
244 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { | |
245 | if (!capable(CAP_SYS_RESOURCE)) | |
246 | goto flags_out; | |
247 | } | |
248 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) | |
249 | migrate = 1; | |
250 | ||
251 | if (flags & EXT4_EOFBLOCKS_FL) { | |
252 | /* we don't support adding EOFBLOCKS flag */ | |
253 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
254 | err = -EOPNOTSUPP; | |
255 | goto flags_out; | |
256 | } | |
2c98eb5e TT |
257 | } else if (oldflags & EXT4_EOFBLOCKS_FL) { |
258 | err = ext4_truncate(inode); | |
259 | if (err) | |
260 | goto flags_out; | |
261 | } | |
9b7365fc LX |
262 | |
263 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
264 | if (IS_ERR(handle)) { | |
265 | err = PTR_ERR(handle); | |
266 | goto flags_out; | |
267 | } | |
268 | if (IS_SYNC(inode)) | |
269 | ext4_handle_sync(handle); | |
270 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
271 | if (err) | |
272 | goto flags_err; | |
273 | ||
274 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
275 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
276 | continue; | |
f8011d93 JK |
277 | /* These flags get special treatment later */ |
278 | if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) | |
279 | continue; | |
9b7365fc LX |
280 | if (mask & flags) |
281 | ext4_set_inode_flag(inode, i); | |
282 | else | |
283 | ext4_clear_inode_flag(inode, i); | |
284 | } | |
285 | ||
286 | ext4_set_inode_flags(inode); | |
eeca7ea1 | 287 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
288 | |
289 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
290 | flags_err: | |
291 | ext4_journal_stop(handle); | |
292 | if (err) | |
293 | goto flags_out; | |
294 | ||
295 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) | |
296 | err = ext4_change_inode_journal_flag(inode, jflag); | |
297 | if (err) | |
298 | goto flags_out; | |
299 | if (migrate) { | |
300 | if (flags & EXT4_EXTENTS_FL) | |
301 | err = ext4_ext_migrate(inode); | |
302 | else | |
303 | err = ext4_ind_migrate(inode); | |
304 | } | |
305 | ||
306 | flags_out: | |
307 | return err; | |
308 | } | |
309 | ||
310 | #ifdef CONFIG_QUOTA | |
311 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
312 | { | |
313 | struct inode *inode = file_inode(filp); | |
314 | struct super_block *sb = inode->i_sb; | |
315 | struct ext4_inode_info *ei = EXT4_I(inode); | |
316 | int err, rc; | |
317 | handle_t *handle; | |
318 | kprojid_t kprojid; | |
319 | struct ext4_iloc iloc; | |
320 | struct ext4_inode *raw_inode; | |
079788d0 | 321 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 322 | |
0b7b7779 | 323 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
324 | if (projid != EXT4_DEF_PROJID) |
325 | return -EOPNOTSUPP; | |
326 | else | |
327 | return 0; | |
328 | } | |
329 | ||
330 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
331 | return -EOPNOTSUPP; | |
332 | ||
333 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); | |
334 | ||
335 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) | |
336 | return 0; | |
337 | ||
338 | err = mnt_want_write_file(filp); | |
339 | if (err) | |
340 | return err; | |
341 | ||
342 | err = -EPERM; | |
5955102c | 343 | inode_lock(inode); |
9b7365fc LX |
344 | /* Is it quota file? Do not allow user to mess with it */ |
345 | if (IS_NOQUOTA(inode)) | |
346 | goto out_unlock; | |
347 | ||
348 | err = ext4_get_inode_loc(inode, &iloc); | |
349 | if (err) | |
350 | goto out_unlock; | |
351 | ||
352 | raw_inode = ext4_raw_inode(&iloc); | |
353 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
354 | err = -EOVERFLOW; | |
355 | brelse(iloc.bh); | |
356 | goto out_unlock; | |
357 | } | |
358 | brelse(iloc.bh); | |
359 | ||
360 | dquot_initialize(inode); | |
361 | ||
362 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
363 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
364 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
365 | if (IS_ERR(handle)) { | |
366 | err = PTR_ERR(handle); | |
367 | goto out_unlock; | |
368 | } | |
369 | ||
370 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
371 | if (err) | |
372 | goto out_stop; | |
373 | ||
079788d0 WS |
374 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
375 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
376 | err = __dquot_transfer(inode, transfer_to); | |
377 | dqput(transfer_to[PRJQUOTA]); | |
378 | if (err) | |
379 | goto out_dirty; | |
9b7365fc | 380 | } |
079788d0 | 381 | |
9b7365fc | 382 | EXT4_I(inode)->i_projid = kprojid; |
eeca7ea1 | 383 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
384 | out_dirty: |
385 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
386 | if (!err) | |
387 | err = rc; | |
388 | out_stop: | |
389 | ext4_journal_stop(handle); | |
390 | out_unlock: | |
5955102c | 391 | inode_unlock(inode); |
9b7365fc LX |
392 | mnt_drop_write_file(filp); |
393 | return err; | |
394 | } | |
395 | #else | |
396 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
397 | { | |
398 | if (projid != EXT4_DEF_PROJID) | |
399 | return -EOPNOTSUPP; | |
400 | return 0; | |
401 | } | |
402 | #endif | |
403 | ||
404 | /* Transfer internal flags to xflags */ | |
405 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
406 | { | |
407 | __u32 xflags = 0; | |
408 | ||
409 | if (iflags & EXT4_SYNC_FL) | |
410 | xflags |= FS_XFLAG_SYNC; | |
411 | if (iflags & EXT4_IMMUTABLE_FL) | |
412 | xflags |= FS_XFLAG_IMMUTABLE; | |
413 | if (iflags & EXT4_APPEND_FL) | |
414 | xflags |= FS_XFLAG_APPEND; | |
415 | if (iflags & EXT4_NODUMP_FL) | |
416 | xflags |= FS_XFLAG_NODUMP; | |
417 | if (iflags & EXT4_NOATIME_FL) | |
418 | xflags |= FS_XFLAG_NOATIME; | |
419 | if (iflags & EXT4_PROJINHERIT_FL) | |
420 | xflags |= FS_XFLAG_PROJINHERIT; | |
421 | return xflags; | |
422 | } | |
423 | ||
d14e7683 JK |
424 | #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ |
425 | FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ | |
426 | FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) | |
427 | ||
9b7365fc LX |
428 | /* Transfer xflags flags to internal */ |
429 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
430 | { | |
431 | unsigned long iflags = 0; | |
432 | ||
433 | if (xflags & FS_XFLAG_SYNC) | |
434 | iflags |= EXT4_SYNC_FL; | |
435 | if (xflags & FS_XFLAG_IMMUTABLE) | |
436 | iflags |= EXT4_IMMUTABLE_FL; | |
437 | if (xflags & FS_XFLAG_APPEND) | |
438 | iflags |= EXT4_APPEND_FL; | |
439 | if (xflags & FS_XFLAG_NODUMP) | |
440 | iflags |= EXT4_NODUMP_FL; | |
441 | if (xflags & FS_XFLAG_NOATIME) | |
442 | iflags |= EXT4_NOATIME_FL; | |
443 | if (xflags & FS_XFLAG_PROJINHERIT) | |
444 | iflags |= EXT4_PROJINHERIT_FL; | |
445 | ||
446 | return iflags; | |
447 | } | |
448 | ||
1a20a630 | 449 | static int ext4_shutdown(struct super_block *sb, unsigned long arg) |
783d9485 TT |
450 | { |
451 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
452 | __u32 flags; | |
453 | ||
454 | if (!capable(CAP_SYS_ADMIN)) | |
455 | return -EPERM; | |
456 | ||
457 | if (get_user(flags, (__u32 __user *)arg)) | |
458 | return -EFAULT; | |
459 | ||
460 | if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) | |
461 | return -EINVAL; | |
462 | ||
463 | if (ext4_forced_shutdown(sbi)) | |
464 | return 0; | |
465 | ||
466 | ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); | |
467 | ||
468 | switch (flags) { | |
469 | case EXT4_GOING_FLAGS_DEFAULT: | |
470 | freeze_bdev(sb->s_bdev); | |
471 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
472 | thaw_bdev(sb->s_bdev, sb); | |
473 | break; | |
474 | case EXT4_GOING_FLAGS_LOGFLUSH: | |
475 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
476 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
477 | (void) ext4_force_commit(sb); | |
478 | jbd2_journal_abort(sbi->s_journal, 0); | |
479 | } | |
480 | break; | |
481 | case EXT4_GOING_FLAGS_NOLOGFLUSH: | |
482 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
483 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
484 | msleep(100); | |
485 | jbd2_journal_abort(sbi->s_journal, 0); | |
486 | } | |
487 | break; | |
488 | default: | |
489 | return -EINVAL; | |
490 | } | |
491 | clear_opt(sb, DISCARD); | |
492 | return 0; | |
493 | } | |
494 | ||
0c9ec4be DW |
495 | struct getfsmap_info { |
496 | struct super_block *gi_sb; | |
497 | struct fsmap_head __user *gi_data; | |
498 | unsigned int gi_idx; | |
499 | __u32 gi_last_flags; | |
500 | }; | |
501 | ||
502 | static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) | |
503 | { | |
504 | struct getfsmap_info *info = priv; | |
505 | struct fsmap fm; | |
506 | ||
507 | trace_ext4_getfsmap_mapping(info->gi_sb, xfm); | |
508 | ||
509 | info->gi_last_flags = xfm->fmr_flags; | |
510 | ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); | |
511 | if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, | |
512 | sizeof(struct fsmap))) | |
513 | return -EFAULT; | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | static int ext4_ioc_getfsmap(struct super_block *sb, | |
519 | struct fsmap_head __user *arg) | |
520 | { | |
521 | struct getfsmap_info info = {0}; | |
522 | struct ext4_fsmap_head xhead = {0}; | |
523 | struct fsmap_head head; | |
524 | bool aborted = false; | |
525 | int error; | |
526 | ||
527 | if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) | |
528 | return -EFAULT; | |
529 | if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || | |
530 | memchr_inv(head.fmh_keys[0].fmr_reserved, 0, | |
531 | sizeof(head.fmh_keys[0].fmr_reserved)) || | |
532 | memchr_inv(head.fmh_keys[1].fmr_reserved, 0, | |
533 | sizeof(head.fmh_keys[1].fmr_reserved))) | |
534 | return -EINVAL; | |
535 | /* | |
536 | * ext4 doesn't report file extents at all, so the only valid | |
537 | * file offsets are the magic ones (all zeroes or all ones). | |
538 | */ | |
539 | if (head.fmh_keys[0].fmr_offset || | |
540 | (head.fmh_keys[1].fmr_offset != 0 && | |
541 | head.fmh_keys[1].fmr_offset != -1ULL)) | |
542 | return -EINVAL; | |
543 | ||
544 | xhead.fmh_iflags = head.fmh_iflags; | |
545 | xhead.fmh_count = head.fmh_count; | |
546 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); | |
547 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); | |
548 | ||
549 | trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); | |
550 | trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); | |
551 | ||
552 | info.gi_sb = sb; | |
553 | info.gi_data = arg; | |
554 | error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); | |
555 | if (error == EXT4_QUERY_RANGE_ABORT) { | |
556 | error = 0; | |
557 | aborted = true; | |
558 | } else if (error) | |
559 | return error; | |
560 | ||
561 | /* If we didn't abort, set the "last" flag in the last fmx */ | |
562 | if (!aborted && info.gi_idx) { | |
563 | info.gi_last_flags |= FMR_OF_LAST; | |
564 | if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, | |
565 | &info.gi_last_flags, | |
566 | sizeof(info.gi_last_flags))) | |
567 | return -EFAULT; | |
568 | } | |
569 | ||
570 | /* copy back header */ | |
571 | head.fmh_entries = xhead.fmh_entries; | |
572 | head.fmh_oflags = xhead.fmh_oflags; | |
573 | if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) | |
574 | return -EFAULT; | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
5cdd7b2d | 579 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 580 | { |
496ad9aa | 581 | struct inode *inode = file_inode(filp); |
bab08ab9 | 582 | struct super_block *sb = inode->i_sb; |
617ba13b | 583 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 584 | unsigned int flags; |
ac27a0ec | 585 | |
af5bc92d | 586 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
587 | |
588 | switch (cmd) { | |
0c9ec4be DW |
589 | case FS_IOC_GETFSMAP: |
590 | return ext4_ioc_getfsmap(sb, (void __user *)arg); | |
617ba13b | 591 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 592 | ext4_get_inode_flags(ei); |
617ba13b | 593 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 594 | return put_user(flags, (int __user *) arg); |
617ba13b | 595 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 596 | int err; |
ac27a0ec | 597 | |
2e149670 | 598 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
599 | return -EACCES; |
600 | ||
601 | if (get_user(flags, (int __user *) arg)) | |
602 | return -EFAULT; | |
603 | ||
d14e7683 JK |
604 | if (flags & ~EXT4_FL_USER_VISIBLE) |
605 | return -EOPNOTSUPP; | |
606 | /* | |
607 | * chattr(1) grabs flags via GETFLAGS, modifies the result and | |
608 | * passes that to SETFLAGS. So we cannot easily make SETFLAGS | |
609 | * more restrictive than just silently masking off visible but | |
610 | * not settable flags as we always did. | |
611 | */ | |
612 | flags &= EXT4_FL_USER_MODIFIABLE; | |
613 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
614 | return -EOPNOTSUPP; | |
615 | ||
a561be71 | 616 | err = mnt_want_write_file(filp); |
42a74f20 DH |
617 | if (err) |
618 | return err; | |
619 | ||
5955102c | 620 | inode_lock(inode); |
9b7365fc | 621 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 622 | inode_unlock(inode); |
2a79f17e | 623 | mnt_drop_write_file(filp); |
ac27a0ec DK |
624 | return err; |
625 | } | |
617ba13b MC |
626 | case EXT4_IOC_GETVERSION: |
627 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 628 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
629 | case EXT4_IOC_SETVERSION: |
630 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 631 | handle_t *handle; |
617ba13b | 632 | struct ext4_iloc iloc; |
ac27a0ec DK |
633 | __u32 generation; |
634 | int err; | |
635 | ||
2e149670 | 636 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 637 | return -EPERM; |
42a74f20 | 638 | |
9aa5d32b | 639 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
640 | ext4_warning(sb, "Setting inode version is not " |
641 | "supported with metadata_csum enabled."); | |
642 | return -ENOTTY; | |
643 | } | |
644 | ||
a561be71 | 645 | err = mnt_want_write_file(filp); |
42a74f20 DH |
646 | if (err) |
647 | return err; | |
648 | if (get_user(generation, (int __user *) arg)) { | |
649 | err = -EFAULT; | |
650 | goto setversion_out; | |
651 | } | |
ac27a0ec | 652 | |
5955102c | 653 | inode_lock(inode); |
9924a92a | 654 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
655 | if (IS_ERR(handle)) { |
656 | err = PTR_ERR(handle); | |
6c2155b9 | 657 | goto unlock_out; |
42a74f20 | 658 | } |
617ba13b | 659 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 660 | if (err == 0) { |
eeca7ea1 | 661 | inode->i_ctime = current_time(inode); |
ac27a0ec | 662 | inode->i_generation = generation; |
617ba13b | 663 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 664 | } |
617ba13b | 665 | ext4_journal_stop(handle); |
6c2155b9 DH |
666 | |
667 | unlock_out: | |
5955102c | 668 | inode_unlock(inode); |
42a74f20 | 669 | setversion_out: |
2a79f17e | 670 | mnt_drop_write_file(filp); |
ac27a0ec DK |
671 | return err; |
672 | } | |
617ba13b MC |
673 | case EXT4_IOC_GROUP_EXTEND: { |
674 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 675 | int err, err2=0; |
ac27a0ec | 676 | |
8f82f840 YY |
677 | err = ext4_resize_begin(sb); |
678 | if (err) | |
679 | return err; | |
ac27a0ec | 680 | |
014a1770 DH |
681 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
682 | err = -EFAULT; | |
683 | goto group_extend_out; | |
684 | } | |
ac27a0ec | 685 | |
e2b911c5 | 686 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
687 | ext4_msg(sb, KERN_ERR, |
688 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
689 | err = -EOPNOTSUPP; |
690 | goto group_extend_out; | |
bab08ab9 TT |
691 | } |
692 | ||
a561be71 | 693 | err = mnt_want_write_file(filp); |
42a74f20 | 694 | if (err) |
014a1770 | 695 | goto group_extend_out; |
42a74f20 | 696 | |
617ba13b | 697 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
698 | if (EXT4_SB(sb)->s_journal) { |
699 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
700 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
701 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
702 | } | |
7ffe1ea8 HK |
703 | if (err == 0) |
704 | err = err2; | |
2a79f17e | 705 | mnt_drop_write_file(filp); |
014a1770 | 706 | group_extend_out: |
8f82f840 | 707 | ext4_resize_end(sb); |
ac27a0ec DK |
708 | return err; |
709 | } | |
748de673 AF |
710 | |
711 | case EXT4_IOC_MOVE_EXT: { | |
712 | struct move_extent me; | |
2903ff01 AV |
713 | struct fd donor; |
714 | int err; | |
748de673 | 715 | |
4a58579b AF |
716 | if (!(filp->f_mode & FMODE_READ) || |
717 | !(filp->f_mode & FMODE_WRITE)) | |
718 | return -EBADF; | |
719 | ||
748de673 AF |
720 | if (copy_from_user(&me, |
721 | (struct move_extent __user *)arg, sizeof(me))) | |
722 | return -EFAULT; | |
4a58579b | 723 | me.moved_len = 0; |
748de673 | 724 | |
2903ff01 AV |
725 | donor = fdget(me.donor_fd); |
726 | if (!donor.file) | |
748de673 AF |
727 | return -EBADF; |
728 | ||
2903ff01 | 729 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
730 | err = -EBADF; |
731 | goto mext_out; | |
748de673 AF |
732 | } |
733 | ||
e2b911c5 | 734 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
735 | ext4_msg(sb, KERN_ERR, |
736 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
737 | err = -EOPNOTSUPP; |
738 | goto mext_out; | |
73f34a5e RZ |
739 | } else if (IS_DAX(inode)) { |
740 | ext4_msg(sb, KERN_ERR, | |
741 | "Online defrag not supported with DAX"); | |
742 | err = -EOPNOTSUPP; | |
743 | goto mext_out; | |
bab08ab9 TT |
744 | } |
745 | ||
a561be71 | 746 | err = mnt_want_write_file(filp); |
4a58579b AF |
747 | if (err) |
748 | goto mext_out; | |
749 | ||
2903ff01 | 750 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 751 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 752 | mnt_drop_write_file(filp); |
748de673 | 753 | |
60e6679e | 754 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 755 | &me, sizeof(me))) |
4a58579b AF |
756 | err = -EFAULT; |
757 | mext_out: | |
2903ff01 | 758 | fdput(donor); |
748de673 AF |
759 | return err; |
760 | } | |
761 | ||
617ba13b MC |
762 | case EXT4_IOC_GROUP_ADD: { |
763 | struct ext4_new_group_data input; | |
ac046f1d | 764 | int err, err2=0; |
ac27a0ec | 765 | |
8f82f840 YY |
766 | err = ext4_resize_begin(sb); |
767 | if (err) | |
768 | return err; | |
ac27a0ec | 769 | |
617ba13b | 770 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
771 | sizeof(input))) { |
772 | err = -EFAULT; | |
773 | goto group_add_out; | |
774 | } | |
ac27a0ec | 775 | |
e2b911c5 | 776 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
777 | ext4_msg(sb, KERN_ERR, |
778 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
779 | err = -EOPNOTSUPP; |
780 | goto group_add_out; | |
bab08ab9 TT |
781 | } |
782 | ||
a561be71 | 783 | err = mnt_want_write_file(filp); |
42a74f20 | 784 | if (err) |
014a1770 | 785 | goto group_add_out; |
42a74f20 | 786 | |
617ba13b | 787 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
788 | if (EXT4_SB(sb)->s_journal) { |
789 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
790 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
791 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
792 | } | |
7ffe1ea8 HK |
793 | if (err == 0) |
794 | err = err2; | |
2a79f17e | 795 | mnt_drop_write_file(filp); |
7f511862 TT |
796 | if (!err && ext4_has_group_desc_csum(sb) && |
797 | test_opt(sb, INIT_INODE_TABLE)) | |
798 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 799 | group_add_out: |
8f82f840 | 800 | ext4_resize_end(sb); |
ac27a0ec DK |
801 | return err; |
802 | } | |
803 | ||
c14c6fd5 | 804 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
805 | { |
806 | int err; | |
2e149670 | 807 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
808 | return -EACCES; |
809 | ||
a561be71 | 810 | err = mnt_want_write_file(filp); |
2a43a878 AK |
811 | if (err) |
812 | return err; | |
813 | /* | |
814 | * inode_mutex prevent write and truncate on the file. | |
815 | * Read still goes through. We take i_data_sem in | |
816 | * ext4_ext_swap_inode_data before we switch the | |
817 | * inode format to prevent read. | |
818 | */ | |
5955102c | 819 | inode_lock((inode)); |
2a43a878 | 820 | err = ext4_ext_migrate(inode); |
5955102c | 821 | inode_unlock((inode)); |
2a79f17e | 822 | mnt_drop_write_file(filp); |
2a43a878 AK |
823 | return err; |
824 | } | |
c14c6fd5 | 825 | |
ccd2506b TT |
826 | case EXT4_IOC_ALLOC_DA_BLKS: |
827 | { | |
828 | int err; | |
2e149670 | 829 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
830 | return -EACCES; |
831 | ||
a561be71 | 832 | err = mnt_want_write_file(filp); |
ccd2506b TT |
833 | if (err) |
834 | return err; | |
835 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 836 | mnt_drop_write_file(filp); |
ccd2506b TT |
837 | return err; |
838 | } | |
839 | ||
393d1d1d | 840 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
841 | { |
842 | int err; | |
393d1d1d DTB |
843 | if (!(filp->f_mode & FMODE_WRITE)) |
844 | return -EBADF; | |
3e67cfad DM |
845 | err = mnt_want_write_file(filp); |
846 | if (err) | |
847 | return err; | |
848 | err = swap_inode_boot_loader(sb, inode); | |
849 | mnt_drop_write_file(filp); | |
850 | return err; | |
851 | } | |
393d1d1d | 852 | |
19c5246d YY |
853 | case EXT4_IOC_RESIZE_FS: { |
854 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 855 | int err = 0, err2 = 0; |
7f511862 | 856 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 857 | |
e2b911c5 | 858 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
859 | ext4_msg(sb, KERN_ERR, |
860 | "Online resizing not (yet) supported with bigalloc"); | |
861 | return -EOPNOTSUPP; | |
862 | } | |
863 | ||
19c5246d YY |
864 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
865 | sizeof(__u64))) { | |
866 | return -EFAULT; | |
867 | } | |
868 | ||
19c5246d YY |
869 | err = ext4_resize_begin(sb); |
870 | if (err) | |
871 | return err; | |
872 | ||
8cae6f71 | 873 | err = mnt_want_write_file(filp); |
19c5246d YY |
874 | if (err) |
875 | goto resizefs_out; | |
876 | ||
877 | err = ext4_resize_fs(sb, n_blocks_count); | |
878 | if (EXT4_SB(sb)->s_journal) { | |
879 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
880 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
881 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
882 | } | |
883 | if (err == 0) | |
884 | err = err2; | |
8cae6f71 | 885 | mnt_drop_write_file(filp); |
7f511862 TT |
886 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
887 | ext4_has_group_desc_csum(sb) && | |
888 | test_opt(sb, INIT_INODE_TABLE)) | |
889 | err = ext4_register_li_request(sb, o_group); | |
890 | ||
19c5246d YY |
891 | resizefs_out: |
892 | ext4_resize_end(sb); | |
893 | return err; | |
894 | } | |
895 | ||
e681c047 LC |
896 | case FITRIM: |
897 | { | |
41431792 | 898 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
899 | struct fstrim_range range; |
900 | int ret = 0; | |
901 | ||
902 | if (!capable(CAP_SYS_ADMIN)) | |
903 | return -EPERM; | |
904 | ||
41431792 LC |
905 | if (!blk_queue_discard(q)) |
906 | return -EOPNOTSUPP; | |
907 | ||
e6705f7c | 908 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
909 | sizeof(range))) |
910 | return -EFAULT; | |
911 | ||
5c2ed62f LC |
912 | range.minlen = max((unsigned int)range.minlen, |
913 | q->limits.discard_granularity); | |
e681c047 LC |
914 | ret = ext4_trim_fs(sb, &range); |
915 | if (ret < 0) | |
916 | return ret; | |
917 | ||
e6705f7c | 918 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
919 | sizeof(range))) |
920 | return -EFAULT; | |
921 | ||
922 | return 0; | |
923 | } | |
7869a4a6 TT |
924 | case EXT4_IOC_PRECACHE_EXTENTS: |
925 | return ext4_ext_precache(inode); | |
9bd8212f | 926 | |
db717d8e | 927 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
9a200d07 RW |
928 | if (!ext4_has_feature_encrypt(sb)) |
929 | return -EOPNOTSUPP; | |
db717d8e | 930 | return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
9a200d07 | 931 | |
9bd8212f | 932 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { |
ba679017 | 933 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
934 | int err, err2; |
935 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
936 | handle_t *handle; | |
937 | ||
35997d1c | 938 | if (!ext4_has_feature_encrypt(sb)) |
9bd8212f MH |
939 | return -EOPNOTSUPP; |
940 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
941 | err = mnt_want_write_file(filp); | |
942 | if (err) | |
943 | return err; | |
944 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
945 | if (IS_ERR(handle)) { | |
946 | err = PTR_ERR(handle); | |
947 | goto pwsalt_err_exit; | |
948 | } | |
949 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
950 | if (err) | |
951 | goto pwsalt_err_journal; | |
952 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
953 | err = ext4_handle_dirty_metadata(handle, NULL, | |
954 | sbi->s_sbh); | |
955 | pwsalt_err_journal: | |
956 | err2 = ext4_journal_stop(handle); | |
957 | if (err2 && !err) | |
958 | err = err2; | |
959 | pwsalt_err_exit: | |
960 | mnt_drop_write_file(filp); | |
961 | if (err) | |
962 | return err; | |
963 | } | |
b4ab9e29 FF |
964 | if (copy_to_user((void __user *) arg, |
965 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
966 | return -EFAULT; |
967 | return 0; | |
ba679017 EB |
968 | #else |
969 | return -EOPNOTSUPP; | |
970 | #endif | |
9bd8212f | 971 | } |
db717d8e EB |
972 | case EXT4_IOC_GET_ENCRYPTION_POLICY: |
973 | return fscrypt_ioctl_get_policy(filp, (void __user *)arg); | |
9bd8212f | 974 | |
9b7365fc LX |
975 | case EXT4_IOC_FSGETXATTR: |
976 | { | |
977 | struct fsxattr fa; | |
978 | ||
979 | memset(&fa, 0, sizeof(struct fsxattr)); | |
980 | ext4_get_inode_flags(ei); | |
981 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); | |
982 | ||
0b7b7779 | 983 | if (ext4_has_feature_project(inode->i_sb)) { |
9b7365fc LX |
984 | fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, |
985 | EXT4_I(inode)->i_projid); | |
986 | } | |
987 | ||
988 | if (copy_to_user((struct fsxattr __user *)arg, | |
989 | &fa, sizeof(fa))) | |
990 | return -EFAULT; | |
991 | return 0; | |
992 | } | |
993 | case EXT4_IOC_FSSETXATTR: | |
994 | { | |
995 | struct fsxattr fa; | |
996 | int err; | |
997 | ||
998 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
999 | sizeof(fa))) | |
1000 | return -EFAULT; | |
1001 | ||
1002 | /* Make sure caller has proper permission */ | |
1003 | if (!inode_owner_or_capable(inode)) | |
1004 | return -EACCES; | |
1005 | ||
d14e7683 JK |
1006 | if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) |
1007 | return -EOPNOTSUPP; | |
1008 | ||
1009 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
1010 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
1011 | return -EOPNOTSUPP; | |
1012 | ||
9b7365fc LX |
1013 | err = mnt_want_write_file(filp); |
1014 | if (err) | |
1015 | return err; | |
1016 | ||
5955102c | 1017 | inode_lock(inode); |
9b7365fc LX |
1018 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
1019 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
1020 | err = ext4_ioctl_setflags(inode, flags); | |
5955102c | 1021 | inode_unlock(inode); |
9b7365fc LX |
1022 | mnt_drop_write_file(filp); |
1023 | if (err) | |
1024 | return err; | |
1025 | ||
1026 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); | |
1027 | if (err) | |
1028 | return err; | |
1029 | ||
1030 | return 0; | |
1031 | } | |
e9be2ac7 TT |
1032 | case EXT4_IOC_SHUTDOWN: |
1033 | return ext4_shutdown(sb, arg); | |
ac27a0ec DK |
1034 | default: |
1035 | return -ENOTTY; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | #ifdef CONFIG_COMPAT | |
617ba13b | 1040 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 1041 | { |
ac27a0ec DK |
1042 | /* These are just misnamed, they actually get/put from/to user an int */ |
1043 | switch (cmd) { | |
617ba13b MC |
1044 | case EXT4_IOC32_GETFLAGS: |
1045 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 1046 | break; |
617ba13b MC |
1047 | case EXT4_IOC32_SETFLAGS: |
1048 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 1049 | break; |
617ba13b MC |
1050 | case EXT4_IOC32_GETVERSION: |
1051 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 1052 | break; |
617ba13b MC |
1053 | case EXT4_IOC32_SETVERSION: |
1054 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 1055 | break; |
617ba13b MC |
1056 | case EXT4_IOC32_GROUP_EXTEND: |
1057 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 1058 | break; |
617ba13b MC |
1059 | case EXT4_IOC32_GETVERSION_OLD: |
1060 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 1061 | break; |
617ba13b MC |
1062 | case EXT4_IOC32_SETVERSION_OLD: |
1063 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 1064 | break; |
617ba13b MC |
1065 | case EXT4_IOC32_GETRSVSZ: |
1066 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 1067 | break; |
617ba13b MC |
1068 | case EXT4_IOC32_SETRSVSZ: |
1069 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 1070 | break; |
4d92dc0f BH |
1071 | case EXT4_IOC32_GROUP_ADD: { |
1072 | struct compat_ext4_new_group_input __user *uinput; | |
1073 | struct ext4_new_group_input input; | |
1074 | mm_segment_t old_fs; | |
1075 | int err; | |
1076 | ||
1077 | uinput = compat_ptr(arg); | |
1078 | err = get_user(input.group, &uinput->group); | |
1079 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
1080 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
1081 | err |= get_user(input.inode_table, &uinput->inode_table); | |
1082 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
1083 | err |= get_user(input.reserved_blocks, | |
1084 | &uinput->reserved_blocks); | |
1085 | if (err) | |
1086 | return -EFAULT; | |
1087 | old_fs = get_fs(); | |
1088 | set_fs(KERNEL_DS); | |
1089 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
1090 | (unsigned long) &input); | |
1091 | set_fs(old_fs); | |
1092 | return err; | |
1093 | } | |
b684b2ee | 1094 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 1095 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 1096 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
1097 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
1098 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
1099 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
e9be2ac7 | 1100 | case EXT4_IOC_SHUTDOWN: |
0c9ec4be | 1101 | case FS_IOC_GETFSMAP: |
b684b2ee | 1102 | break; |
ac27a0ec DK |
1103 | default: |
1104 | return -ENOIOCTLCMD; | |
1105 | } | |
5cdd7b2d | 1106 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
1107 | } |
1108 | #endif |